RubyAMP is a TextMate bundle that makes you more productive in editing, navigating, and debugging Ruby code. Now you can easily:

• auto-complete from all open tabs
• jump to a method, class, or fixture named under the cursor
• start the debugger on a series of RSpec examples and break at the current line
• inspect by highlighting to evaluate to tooltip or clipboard
• fire up a Merb/Rails server or console for your current app
• tail development.log

RubyAMP is insanely awesome.

I had to add

to ~/.MacOSX/environment.plist

Actually, I had to create it. Apparently this is a strange TextMate issue (see the "important" paragrah over at Macromates)